height = 1.75
weight = 80.5

bmi = weight / height ** 2

if bmi < 18.5:
    print("过轻")
elif bmi < 25:
    print("正常")
elif bmi < 28:
    print("过重")
elif bmi < 32:
    print("肥胖")
else: 
    print("严重肥胖")
